Oscillating pump.



No. 125,595. PATEIITHJ APR. 14, 1903.

\ H. E. SGHRADER.

OSGIL'LATING PUMP. APPLICATION FILED 00T. 22. 1900. l .1ro Monm.,

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NITED STATES PATENT Genion.

HUGO E. SOHRADER, OFOHI'OAGO, ILLINOIS.

OSCILLATING PUMP.

SPECIFICATION forming part of Letters Patent N o. 725,595, dated April 14, 1903.

` Application led October 22, 1900. Serial No. 33,825. (No model.)

To @ZZ whom it mag/concern.:

Be it known that I, HUGO E. SCHRADER, a citizen of the United States, and a resident of Chicago,in' the State of lllinoi`s,have invented certain new and useful'lmprovements in Oscillating Pumps, -of which the following is a specification, reference being had to the accompanyin g drawings,forming a part thereof.

The purpose of this invention is to provide an improved construction of oscillating pump with the specific purpose of affording bett-er means than heretofore for draining the pumpchambers and connected pipes to prevent freezing.

In the drawings, Figure l is an axial section of my improved pump. Fig. 2 is a section at the line 2 2 on Fig. l. Fig. 3 is adetail section at the line 3 3 on Fig. l. Fig. Ltis a detail section at the line/i 4r on Fig. 2. Fig. 5 is an inverted-plan of the Outlet-chamber.

A is the pump casing or body. It is preferably in the form of a cone-frustum with the axis horizontal, having a boss A' for an inlet connection at the lower side and a similar boss A2 at the upper side for an outlet'connection, a boss A3 for shaft-bearing, and stuffing-box for the shaft of the oscillating diaphragm at the forward side, and a removable plate A4 at the rear side.

B is an inlet-chamber, which is secured within the casing A at the lower side, spanning the inlet-opening through the boss A.4

C is a similar outlet-chamber secured in the casing at the upper side directly opposite the inlet chamber andV spanning the outlet through the boss A2. Spaces left between the inlet and outlet chambers within the casing constitute substantially sectoral piston-y chambers A5 A5, oppositely located with respect to the axis.

D is the diaphragm-piston, having a shaft- D', which obtains seat in the facing inner walls or ends of the inlet and outlet 'cham-- bers, respectively, and occupying the space between said chambers constitutes with them a completepartition between the two sectoral chambers A5 A5, cutting off or closing the communication which would Otherwise exist between'the said two'chambers at the center. The diaphragm-piston D thus comprises two wings extending off from the'shaft D' in the two chambers A5 A5, respectively, and adapted to operate as pistons in said 'chambers as the shaft oscillates.

Inlet-valves B" B are mounted upon the outer sides ofthe walls of the inlet-chamber B, and outlet-valves 00C are'sifmilarly mounted upon the inner sides of the wallsof the outlet-chamber C. All these valves may, be relied upon to close by gravity; but between the outlet valves there maybe secured a spring E, which operates substantially as a lever, causing the opening of oneof Athe inlet-valves to j'close the other if through any defective action it shouldf not be closed by gravity or by the movement of the water.

Through the shaft D ofthe diaphragm-piston there are formed two passages D10 D10, one toward one end and the other toward the opposite end of the shaft, within the casing, the distance between them beingimmaterial, provided only they are independent of each other. Each of these passages leads from one side to the other of the diaphragm and also from one to the other of the sectoral chambers A5 A5.

The operation of the pump as thus far d escribed will be understood to be that when the diaphragm-piston is to be oscillated byl means of the operating-lever handle D2, attached to the shaft D', movement in one direction causes water to be drawn in through one of the inlet-valves into one of the sectoral chambers A5, and from that sectoral chamber through one'of the passages D10 into the other sectoral chamber A5, both chambers being thus lled `Aby the same stroke, and upon the reverse nlovementthe water will be forced out in advance ofthe secondarily-iilled chamber A5 through` the: Outletchamber and from'the primarily-filled'chamber A5 through .the passage D10 into the sec- 'ondarily-fllled chamber, the contentsof both chambers being thus discharged at this stroke throughone of the outlet-valves, while at the same time the inlet-valve which was closed 'in the first stroke opens and water enters, filling both sectoral chambers A5 behind the diaphragnrwings as the water `isexpelled: from the chambers in advance ofthe same,v

It will be understood thatthe'ordinary use of'this pump would Iv"l'eaveall the chambers ICO theinlet-chamber out through the casing and through the drain-cock boss A3, in which a drain-cock A30 is seated, both ducts c3 opening through such seat, and the drain-cock having drain -ports a30 (L30, which V register simultaneously with both the ducts CL3 a3 at one position of the cock, while at another position both the ducts are closed. Preferably 'for convenience I make the drain-cock in the form of a hollow elbow and make the ports in such position that they register with the ducts CL3 when the lever-arm A31 thereof hangs down, so that it will serve as a discharge-port, while the horizontal position of the said lever-arm or port corresponds to a closing position of the drain-ports. Notwithstandingr this provision for drainage the chambers of the pump would remain unemptied without some provision for venting them at the top, and besides this the outletchamber and discharge-pipes connected ltherewith would remain full without special provision for emptying them. To accomplish both purposesthat is, to vent the chambers A5 and to drain the outlet-chamber and connecting pipes--I make in the bottom of the outlet-chamber small leak or drain ports c c, one near each end, and I widen the mouth at the upper end of the passages D10 D10 through the diaphragm-piston shaft, as seen at d10 d10, so that at the limitof the oscillation of the piston in one direction one of said extended mouths d10 will lap at one end onto one of the drainports c, While at the other limit of the diaphragms oscillation the similarly-extended mouth d10 of the other passage will lap upon the other drain-port c. This construction, it will be observed, creates at the limit of oscillation a communicating passage from the outlet-chamber down through the shaft into the portion of the chamber A5 below the wing of the diaphragm-valve which is at that time at the lowest position, so that the water from the outlet-chain berand pipes connected therewith can by this passage get by the diaphragm and reach the drain-duct 0,3 at one side. I also form in the wall of the casingAslight recesses ct a in position to afford short and narrow bypasses around the diaphragm-piston at the lowest position of its wings, respectively, at each side, and at that position the water may escape from the chamber A5 at the side at which the diaphragm is in its lowest position; but in order to permit such an escape a vent must still be provided for the chamber A5, and this I eect by making slight notches or recesses'c c' in the lower wall of the outletchamber, which constitutes the upper seat of the shaft, one such notch being made at each edge, the notch at one edge being at a little distance from one of the drain-ports c, that at the other edge being a similar slight distance from the other drain-port c, the distance in each case being such that the mouths of the passages D10 D10, respectively, when lapping the ports c c, respectively, will also lap the notch c nearest such port, this lap being effected by the extension d10 of the mouth which operates to connect the port c with the notch or vent-port c', independently of the fact that it is apart of the passage D10, since for this purpose it may be considered merely as a recess in the case of the shaft. With this construction it will be understood that at either limit of the oscillation of the diaphragm communication is made from the outlet-chamber and pipes connected therewith through one of the drain-ports c by way of the extension d10 of the month of the passage D10 to the vent-port c', thus admitting the pressure of the water in the outlet-chamber and pipes to the upper part of the chamber A5, so that said chamber A5 will be drained at the same time, either by the 'water from the outletchamber taking that course to reach the drain-port a3, or, if the water takes a course through the passage D10, then when the outlet-chamber and pipes are emptied atmospheric pressure being admitted to the upper part of the chamber A5 to drain by way of the by-pass ct and drain-port a3. This description may be taken as applying to the chamber A5 at the side at which the diaphragm is at its lowest position. The chamber at the other side will be vented through the other passage D10 as soon as the water begins to move out of the rst chamber, followed by the air entering in the course indicated, so that all chambers and passages of the pump will be drained upon the Opening of the drain-cock A30 when the diaphragmpiston is at either limit of its oscillation.

I claim- 1. A pump comprising a casing inclosing substantially sectoral piston chambers formed about a common axis; a diaphragmpiston oscillatingin the pistonchambers,hav ing its shaft conaXial therewith, and closing communication between them; an inlet and an outlet chamber alternating with the piston-chambers about the axis; inlet and outlet valves mounted on the walls of the inlet and outlet chambers respectively; valve-controlled drainage-passages leading from substantially the lowest points of the pistonchambers respectively; vent-passages leading into the upper part of the piston-chambers respectively, and means by which the oscillation of the piston controls said ventpassages.

2. A pump comprising a casing inclosing two substantially sectoral chambers formed about a common axis; a diaphragm-piston oscillating in the piston-chambers, having its shaft conaxial therewith and closing communication between them; an inlet and an outlet chamber alternating with the piston-chambers about the axis; inlet and outlet Valves on the walls of the inlet and outlet chambers respectively; drainage-passages leading from substantially the lowest points of the pistonchambers respectively; a valve for controlling discharge through such passages at will, and venting communications from the outlet- IOO IOS

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two substantially sectoral' piston-chambersy formed about a common axis and oppositelyv situated with respect thereto; a diaphragmpiston oscillating in the piston-chambers, having its shaft'conaxialtherewithand closing the communication between them; an inlet and an outlet chamber, alternating 4with the piston-chamber about the axis, and by their wall toward the axis aiordin'g seat for the diaphragm-shaft; inlet and outlet. valves mounted on the walls ofthe inlet and outlet chambers respectively; the diaphragm-shaft having two passages leading respectively from the yportions of one sectoral chamber at the other side of the diaphragm to the portions of the other sectoral chamber at the other side of the diaphragm; one of the sectoral chambers having a drainage-passage and a valve to control the same at will; the outlet-chamber wall having a leak-port leading through the shafts seat, and the shaft having apassage which at one limitof the oscillation of the shaft laps on the leak-port, and at the other end opens into one of the piston-chambers.

4. A pump, comprising a casing inclosing two substantially sectoral chambers `formed about a common axis, oppositely situated with respect thereto; a diaphragm-piston oscillating in the piston-chambers, having its shaft conaxial therewith and closing the communication between them; an inlet and an outlet 'chamber alternating with the piston-cham-` ber having a leak-port leading through the seat of the shaft; said shaft-seathavinga'recess at one edge, and the shaft having a recess which at one limit of the oscillation of the diaphragm laps at one end over the leak-port, and at the other end over said marginal recess.

5. A pump, comprising a casing inclosing two substantially sectoral piston-chambers formed about a common axis and oppositely situated with respect thereto; a diaphragmpiston oscillating in the piston-chambers,hav ing its shaft conaxial therewith and closing communication between them; an inlet and an outlet chamber alternating with the piston-chambers about the axis and by their walls toward the axis affording seats for the diaphragm-shaft; inlet and outlet valves, mounted on the walls of the inlet and outletl chambers respectively; the diaphragm-shaft having two passages leading respectively from the portions of one of the chambers at oneside of the diaphragm to the portions of the chamber at -the opposite side; drainagepassa-ges leading from one'piston-chamber, and a valve for controlling the same at will; the outlet-chamber havinga leak-portleadin g through the shafts seat, one end of one of theV shaft-passages beinglaterally extended vto lap on said leak-port at one limit of the oscillation of the diaphragm.

6. A pump, comprisingra casing inclosing two substantially sectoral piston-chambersy formed about a commonaxis and oppositely situated with respect thereto; a diaphragmpiston oscillating in the piston-chambers,hav ing its shaft conaxial therewith and closing the communication between them; an inlet,

said seat having a recess, at one edge, oneV end of one of the shaft-passages being extended to lap'both said leakportand said` marginal recess at one limit of the oscillation of the shaft.

7. A pump, comprising a casing inclosing two substantially sectoral piston-chambers t formed about a commonaxis and oppositely situated with respect thereto; a diaphragmpiston oscillatingin the piston-chambers having its shaft conaxial therewith and closing communication between them; an inlet and an outlet chamber alternating with-the pis- IIO portion of the chamber above to the portion t below the diaphragm, effecting connection with the drain-passage.

Inv testimony whereof -I have hereunto set my hand, at Chicago, Illinois, in the presence of two witnesses, this 13th dayof October,

A. D; 1900. 1 HUGO E. SOHRADER. In presence of` v .t

EDWARD T. WRAY, EDGAR L. CoNAN'r.- 

